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diff --git a/tests/test-extensions/sun/applet/PluginPipeMockUtil.java b/tests/test-extensions/sun/applet/PluginPipeMockUtil.java
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+++ b/tests/test-extensions/sun/applet/PluginPipeMockUtil.java
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+/*   Copyright (C) 2013 Red Hat
+
+This file is part of IcedTea.
+
+IcedTea is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+IcedTea is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with IcedTea; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+/* Must be in sun.applet to access PluginAppletSecurityContext's constructor and PluginObjectStore */
+package sun.applet;
+
+import java.util.IdentityHashMap;
+
+import sun.applet.mock.PluginPipeMock;
+
+/*
+ * Convenience class for PluginPipeMock.
+ * Provides convenient methods for installing a custom pipe mock and cleaning it up.
+ * 
+ * Provides PipeMessageHandler interface and accompany convenience methods which can
+ * be used to define mocked pipes in a simple manner.
+ * */
+public class PluginPipeMockUtil {
+
+    /**************************************************************************
+     *                          Basic setup & teardown                        *
+     **************************************************************************/
+
+    /* Maps PluginPipeMock instances to a ThreadGroup, allowing us to stop all the 
+     * message handling threads that we started when setting up the mock pipes. */
+    static private IdentityHashMap<PluginPipeMock, ThreadGroup> pipeToThreadGroup = new IdentityHashMap<PluginPipeMock, ThreadGroup>();
+
+    /* By providing custom implementations of the input stream & output stream used by PluginStreamHandler,
+     * we are able to mock the C++-side of the plugin. We do this by sending the messages the Java-side expects
+     * to receive. Additionally, we are able to test that the Java-side sends the correct requests.
+     * See PluginPipeMock for more details.
+     */
+    static private PluginPipeMock installPipeMock() {
+        AppletSecurityContextManager.addContext(0, new PluginAppletSecurityContext(0, false /* no security manager */));
+
+        PluginPipeMock pipeMock = new PluginPipeMock();
+
+        PluginStreamHandler streamHandler = new PluginStreamHandler(pipeMock.getResponseInputStream(), pipeMock.getRequestOutputStream());
+        PluginAppletViewer.setStreamhandler(streamHandler);
+        PluginAppletViewer.setPluginCallRequestFactory(new PluginCallRequestFactory());
+
+        streamHandler.startProcessing();
+
+        return pipeMock;
+    }
+
+
+    /* Set up the mocked plugin pipe environment. See installPipeMock for details. */
+    static public PluginPipeMock setupMockedMessageHandling() throws Exception {
+        ThreadGroup pipeThreadGroup = new ThreadGroup("PluginAppletViewerTestThreadGroup") {
+            public void uncaughtException(Thread t, Throwable e) {
+                // Silent death for plugin message handler threads
+            }
+        };
+
+        final PluginPipeMock[] pipeMock = {null};
+        // Do set-up in a thread so we can pass along our thread-group, used for clean-up.
+        Thread initThread = new Thread(pipeThreadGroup, "InstallPipeMockThread") {
+            @Override
+            public void run() {
+                pipeMock[0] = installPipeMock();
+            }
+        };
+
+        initThread.start();
+        initThread.join();
+
+        pipeToThreadGroup.put(pipeMock[0], pipeThreadGroup);
+        return pipeMock[0];
+    }
+    
+    /* Kill any message handling threads started when setting up the mocked pipes */
+    @SuppressWarnings("deprecation")
+    static public void cleanUpMockedMessageHandling(PluginPipeMock pipeMock) throws Exception {
+        ThreadGroup pipeThreadGroup = pipeToThreadGroup.get(pipeMock);
+        if (pipeThreadGroup != null) { 
+            pipeThreadGroup.stop();
+        }
+        pipeToThreadGroup.remove(pipeMock);
+    }
+
+    /**************************************************************************
+     *                          Object store utilities                        *
+     **************************************************************************/
+    /*
+     * Helpers for manipulating the object mapping using to refer to objects in
+     * the plugin
+     */
+    public static Object getPluginStoreObject(int id) {
+        return PluginObjectStore.getInstance().getObject(id);
+    }
+
+    /* Stores the object if it is not yet stored */
+    public static int getPluginStoreId(Object obj) {
+        PluginObjectStore.getInstance().reference(obj);
+        return PluginObjectStore.getInstance().getIdentifier(obj);
+    }
+}